Improvement in governors for steam-engines



@anni didnt JOHN AUGUSTUS LYNCH, OF BOSTON, MASSACHUSETTS.

Letters Patent No. 112,159, dated February 28, 1871.

IMPROVEMENT IN GOVERNORS FOR STEAM-ENGINES.

The Schedule referred to in these-Letters Patent and making part of thesame.

To all persons to whom these presents 'may come Beit known that L JOHNAUeUsrUs LYNCH, of Boston, of the county of Suffolk and State ofMassachusetts, have invented a new and useful Improvement in Governorsfor Engines; and do hereby declare4 the same to be fully described inthe following specification and represented in the accompanyingdrawing-,vof which- Figures l and 2 are side elevations, and

Figures 3A and 4 are vertical sections of one of my improved governors.

Figures 5 and 6 are side elevations of the helical lifter and rotator ofthe propeller.

This governor is of the kind where. the throttlevalve or gate to beactuated by it is moved by a screw-propeller revolving within a liquidcontained in a cistern or vessel.

In the drawing the screw-propeller is exhibited at A as lixed on acarrier, B, having two legs, veach leg at its foot being provided with awheel or frictionroller, a.

The said propeller and carrier turn freely on' a stationary tubularspindle, O, erected within the closed receiver or oil-case D.

The propeller-carrier is 4supported on the helical lifter E, which alsorevolves freely'on' -thc spindle C, and is arranged within the case Dand below the carrier, such helical lifter being a bevel-gear having twohelical cams bpb arranged on and projecting from it, and formed inmanner as represented.

The lifter is supported on a bearing, c, of the case D, and engages with.a driving bevel-gear, F,.that is fixed on the inner end of, ahorizontal shaft, G,.arranged and having a bearing in a tubular arm, H,projected from the hollow neck I, by which the propellercase isconnected with the outercase K.

` A driving-wheel, rl, to receive an endless band, is fixed on the outerend of the shaft G. l

rlhe neck I, closed'at bottom, opens at its upper part directly into thecase D, in order that the liquid or oil may surround the operative gearsand keep them and their rubbing surfaces and shaft suitably lubricated.

Encompassing that part of the spindle which extends above the propelleris a sleeve, or thimble, or tube, L, which rests on the hub of thepropeller-and is closed at top. y

From such top a small wire, e, extends down through the spindle and thebottom ofthe case D, and thence through the top 'of the valve-case or astuffing-box thereon.

At its lower end the said wire e is fastened to one end of a chain, f,which is laid on and fixedto the.

periphery of a sectoral arm, g, that projects from a throttle-valve, M,pivotcd within the induction-passage h of the valve-case, theeduction-passage of the valve-case being in any other convenient part ofit.

The hollow neck Iis .arranged wholly on oneside of the common verticalaxis ofthe valve and propellercases in order that access may readily beobtained to the studng-box 'i at the top of the valve-case.

Another chain, k, fastened to the sectoral arm of the' valve, extendsdown the periphery of such arm, and is fastened to the upper end of acylindrical thimble, Z, containing a helical spring, m, which rests outhe hollow of. the thimble.

The thimble is disposed concentrically within a tubular arm, n,projecting obliquely from the lower part of the valve-case, and beingclosed at its lower end,

except in having a passage through .the center thereof to receive ascrew-rod, o, that screws into the lower end of the arm.

At its upper end the rod has a head, 1J, against which thetop of thehelic'al spring m bears. On revolvingthe rod the helical spring may beeither-contracted or extended, more or less, either to increase ordiminishits power or tension, as occasion may require.. The spling is.to effect the opening ofthe valve, or its movement in a directioncontrary to that in which it may be moved by thel action ofthepropeller.

From the above it will he seen. that, while the engine may be inoperation, the band for actuating the driving-pulley of the governor'will be in action, and such pulley will be kept in revolution, therebycans'- ing the bevel-gear F to revolve and turn the helical lifter.r[his latter, by its action against the carrier of the propeller, willset such carrier in rotation so as to revolve the propeller.

As the propeller may tend to rise within the liquid, the carrier will beborne against the inclined planes or helical cams of the lifter;consequently fthe helical lifter, besides effecting rotary motion of thepropeller, will Yperform another function, that is to say, it will aidin effecting the rise ofthe propeller.

The lifter, by thus favoring the rise or upward niotion of thepropeller, renders the governor muchv more sensitive, itssensitivenessbeing increased with the diminution of the pitch of the`helical plane or planes of thelifter. i

Inasmuch as it is'very desirableto avoid friction as much as possible inthe action of the parts of a governor of this kind, all such frictiontending to diminish its seusitiveness, have adopted the yvery tine wiree to operate the valve by tension rathcrthan thrust.

In the said governor I claim- 1. The combination of the helicalcam-lifter E with the propeller A audits case D, all being to operatesubstantially in 'manner as desoribed.

2. The propeller-case neck I, made as an oil-reser Voir to open into thebody of the case D, and arranged with the driving-gear F, the valve-wiree, and the valve-ease K, substantially iin manner as deseribed.

3. The combination of the spr/ing m, provided with means for varying itstensonas described, with "tlli'e valve. M, .the propeller A, its case D,and the helical cam-lifterl E, all. being arrangedl and combinedsubstantially in manner and s'o as to operateas de4 scribed.

1 J.. AUGUSTUS LYNCH, Witnesses:

R. H. EDDY, J. R. SNOW.

